Separable-die holder



Mar 27, 1.923. H. N. JONES EPARABLE DIE HOLDER Fi1ed Ma -f15, 1920 V 0 u I'm 4m 3/ B3 A" 6 ill five/27752. Howard Nzfones Patented Mar. 27, 1923.

UNITED ATn'r Fries.

HOWARD N. JONES, or rnovrnnncn, nnonnrsnann, .ASSIGNOR or ONE-HALF TO 'IEU'NAUSKI z. CARPENTER, or rnovrnnncn, nnonn ISLAND.

sEPARABLE-nm momma.

Application filed May 15,

To all whom it may concern Be it known that I, HOWARD N. JoNns, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Separab-le-Die Holders, of which the follow ing is a specification.

This invention relates to improvements in separable die holders; and has for its object to provide means in a holder of this character for carrying two separable parts. of a thread-cutting die, means also being provided in the holder whereby the halves of this die may be readily separated sufficiently to disengage the work and be removed directly therefrom and then readily readjusted for another cutting operation.

It is found in practice that by providing means for readily and quickly opening the die after a cutting operation it may be at once removed from the work without the slow backing-01f process incident to the use of the solid die and which opening action also obviates the possibility of stripping or scoring the thread in backing-off; then again by my improved construction the ordinary or standardb-utton die may be employed which may be readily split and applied to the separable parts of my improved holder. The nature and advantages of theinvention will be betterunderstood when the following detail des'criptionqis taken in conmotion with the accompanying drawings, the invention residing in the combination and arrangement of parts as claimed.

In the drawings forming part of this specification like numerals of reference indicate similar parts in the several views and wherein a Figure 1 is a front elevation of myimproved die holder. 1 y i p a Figure 2 is" a front elevation partly in section, of the holder. y i

a Figure '3 is a central sectional edge view through the holder. a 1

Figure 4: is a perspective view of the double cam-operating handler Figure5 is a detailpartly in section, illustrating the cam in position to act upon one of the connecting pins tolift it and its die block to operative position.

. Figure 6 is a perspective viewof the mov- 1920. Serial No. 381,764.

able die block detached and with the die removed.

With reference to the drawings, 10 designates the body portion of the die holder, which is provided with operating handles 11 at either end thereof. This body portion 1s recessed at 12 into which recess is slidably mounted a die-block 13. The side' ceive a reciprocating motion therein, I have provided a pair of elongated pins 20,.the inner end of g each being threaded and screwed into this die block on either side of the die, theouter end of each of these pins being provided with a head 21 rounded on its under surface as at 22. In order to control the movement of this die-block "in the head I have provided a cam-bar 23 which is pivoted at 2+1 between the pins 20 and is provided with oppositely-directed, inclined surfaces, each of which is adapted to engage the under side 22 of each of the pin heads when the (am-bar is swung on its pivot2 ihto. causethese heads to slide upward on their respective inclinedsurfaces and move bothends o-fthe die blocksimultaneouslv inwardly to their normal or working position. y

In orderto move this die block outwardly when released by the double cam member H 23 I have provided recesses in the body portion, in which are mounted coil springs 26 to encircle the pins and actagainst the block to normally force it outward.

The operating position of this die block may be adjusted by rotating the threaded portion of the pins 20 in the block after which the set screws27 in the block are set up against the ends of these pins to firmly lock them in adjusted position.

To positively guide this die block in its in and out movement in the body portion of the holder, I have provided guide pins I 28 which engage grooves 29 in the opposite ends of this block to insure the absolute matching of theqdie valves when the block is moved to operative position. i

In operating my improved separable die holder it is only necessary to obtain an ordinary standard button die, split the same and grind off the edges as at 29, then drop one half into the body portion and the other half into the die block, swing the plates 30 over each half and lock these in position with thumb screws 31 which engage the slots 32 in the plates. The die block with its half of the die is now moved up 1nto opera-ting position by simply throwing the ambar: 23 into alinement with the operating handles 11.

After the die has been passed over the work to cut the thread, it is only necessary to throw the cam-handle 23 to the left which instantly releases both of the pins 20 and permits the die block under action of the springs 26 to automatically open and release the work permitting the holder to be freely removed therefrom.

By this action it will be seen that I obviate the necessity of slowly backing off the die as is the case with solid dies; I also obviate the possibility of stripping or scoring of the thread in this backing-off operation and, therefore, much time is saved.

After. the die has been removed from the work, owing to the fact that the parts are so widely separated the chips may be very readily removed and the die cleaned. To restore the die-halves again to operating position it is only necessary to move the cambar into alinement with the handles which at onceraise the dieblock with its half, and the tool is ready for another thread-cuttingoperation.

:Myimproved holder is simple and prac tical in construction and effective in its operation and by its use threads may be out much quicker and more accurately than with the ordinary one-piece die.

The foregoing description is directed solely towards the construction illustrated, but

I. desire it to be understood that I reserve theprivilege 0t resorting to all the mechan ical changes'to which the device is susceptible, the invention being defined and limited only bythe terms of the appended claims.

I claim:

1. A tool of the character described comprising a body member having oppositely extending handles, a die carrying portion on said. member, a die block slidably mounted on said body member and adapted to be moved into (we-operative relation with said die carrying portion of the body, a die block operating member consisting. of a bar pivoted at: substantially its medial portion to said bodyme berand extending-i h same general direction as the handles of the bod y member and having a handle on at least one mounted on said body member and having projections extending therefrom provided with enlarged portions, and a die block op erating member consisting of a bar pivoted to said body member and having notched. portions thereon adapted tobe inserted between said enlargements on the projection and said body member, and a handle on at least one end of said bar extending in the same general direction as the handles of the body member and adjacent thereto to be accessible to the hands of the operator while gripping the handles of the body member.

3. A tool of the character described, comprising relatively jection extending from one of said blocks slidable through the other of said blocks and having enlarged outer end, means for moving said blocks. into effective cooperative relation consisting of a movable member mounted on the other of said blocks and having a cam surface to engage under said enlarged end of said projection, whereby the blocks are drawn toward each other.

i. A tool of the character described, comprising relatively movable die blocks, a projection extending from one of said blocks, slidably through the body member and having enlarged outer ends, means for moving movable die blocks, a prosaid blocks into effective cooperative relation consisting of av pivoted bar mounted on the other of said blocks and having a notch therein, and, inclined cam surfaces adjacent the edges of the notch in the bar for engaging said projection between its enlarged end and said other block whereby said blocks are drawn toward each other into effective cooperative relation. I i i 5. A tool of the character described, comprising relatively movable die-blocks,'a proed head between the latter and said. other block for drawing the blocks into effective eeen ra e r la is msf d c u e tending from "the "open edge of said notch and terminating at a point in advance of the bottom wall of the notch, whereby the block is locked in its effective position when the enlarged head of the projection passes beyond said cam surfaces on the operating member.

6. A tool of the character described, coInprising a body portion having arecess therein and handle portions at the end thereof, a block slidably mounted in said recess, projections extendin from the block and slid able through said body portion, complemental die members on said block and said body portion in cooperative relation, means for moving the block to maintain said die sections in spaced or ineffective position, enlargements 011 the ends of said projections for limiting the movement of said block caused by said means and a bar pivotally mounted on the body member and having slotted cam surfaces insertable between said enlargements on the projections and said body member for drawing the block and the die thereof into effective working relation with the die on the body member and a handle on at least one end of said bar.

7. A tool of the character described, comprising a body memberhaving a recess therein, a block slidably mounted in the recess, pins slidably mounted through the body portion and in adjustable engagement with said block, resilient means interposed between said body member and the block and normally tending to separate the same enlargements on the outer ends of the pins having abutting engagement with said body portion for limiting the separating movement of said block, and complemental die sections removably mounted in opposing faces of said body member and said block, and means insertable between said enlargements and the body member for drawing said block and the die thereof into effective working relation with the die in the body member, the adjustment of said pins in the block varying the effective working distance between said die sections.

8. In a tool of the character described, comprising a body member having a recess therein, a block slidably mounted in the recess, a pairof pins projecting from the block and slidably extending through the body member and having enlargements on their outer ends for limiting the sliding movement of the block in one direction, complemental diesections carried by opposing faces of said body member and block and in cooperative relation, yieldable means interposed between the block and body member for moving the dies out of effective working engagement, and a bar pivoted intermediate its ends to the body member and at a point between said enlargements, and cam surfaces on the bar insertible between said en largements and said body member for drawing the block against the pressure of said yieldable means to bring said die sections into eifective working relation, and oppositely extending handle members on the body member and a handle on at least one end of said bar extending in the general direction of said handles, of the body member and adjacent thereto.

In testimony whereof I afiix my signature.

HOWARD N. JONES. 

